Erythrocytes can come out of blood capillaries by diapedesis.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question states that erythrocytes (red blood cells) can exit blood capillaries via a process called diapedesis.

2. **Defining Diapedesis**: Diapedesis refers to the process by which blood cells move through the intact walls of blood vessels. It is important to note that this process primarily involves leukocytes (white blood cells), not erythrocytes.

3. **Identifying the Correct Blood Cell**: While erythrocytes are crucial for oxygen transport, it is the leukocytes that perform diapedesis. These white blood cells exit the bloodstream to reach sites of infection or tissue damage.

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